Change .val[s] to .value; is_scalar to isscalar; deprecate; new tests
(also tests that Time.now().value works, or any Time(single-datetime).value)
change Time.__repr__ to say "value=" instead of "vals="
Merge pull request #3 from eteq/time-val-to-value-repr

Change __repr__ to use value instead of vals
Merge pull request #767 from mhvk/time-val-to-value

Make Quantity and Time/TimeDelta consistent attribute naming